Woocommerce HPOS – fatal error – deep_assoc_array_diff

Hi;

I’m a WordPress developer and for one of our clients i’ve tried to implement the High Performance Order Storage (HPOS) due to really slow backend response times. Up to yesterday this was working as intended. Somehow we’re getting the error below currently. Since the stack trace refers to Woocommerse and HPOS I tried disabeling the feature. As soon as i use the regular WordPress posts storage method as primary method the order list loads fine (but slow). When HPOS is my primary storage method, i get the error below when loading the order list (/wp-admin/edit.php?post_type=shop_order) . All checkboxes for synchronisation are still checked and the database transaction method is still set to repeatable read.

If there is anything i can do to smoothen this hickup out please let me know. Up to now HPOS made quite a difference in backend performance.

Yours sincerely
Joris Kroos – Oddworks

Fatal error: Uncaught Error: Automattic\WooCommerce\Utilities\ArrayUtil::deep_assoc_array_diff(): Argument #2 ($array2) must be of type array, null given, called in /public_html/wp-content/plugins/woocommerce/src/Utilities/ArrayUtil.php on line 257
in /public_html/wp-content/plugins/woocommerce/src/Utilities/ArrayUtil.php on line 233

Call stack:

Automattic\W\U\ArrayUtil::deep_assoc_array_diff()
wp-content/plugins/woocommerce/src/Utilities/ArrayUtil.php:257
Automattic\W\U\ArrayUtil::deep_compute_or_compare_array_diff()
wp-content/plugins/woocommerce/src/Utilities/ArrayUtil.php:234
Automattic\W\U\ArrayUtil::deep_assoc_array_diff()
wp-content/plugins/woocommerce/src/Internal/DataStores/Orders/OrdersTableDataStore.php:1268
Automattic\W\I\D\O\OrdersTableDataStore::get_diff_meta_data_between_orders()
wp-content/plugins/woocommerce/src/Internal/DataStores/Orders/OrdersTableDataStore.php:1214
Automattic\W\I\D\O\OrdersTableDataStore::is_post_different_from_order()
wp-content/plugins/woocommerce/src/Internal/DataStores/Orders/OrdersTableDataStore.php:1101
Automattic\W\I\D\O\OrdersTableDataStore::maybe_sync_order()
wp-content/plugins/woocommerce/src/Internal/DataStores/Orders/OrdersTableDataStore.php:1026
Automattic\W\I\D\O\OrdersTableDataStore::read_multiple()
wp-content/plugins/woocommerce/includes/class-wc-data-store.php:171
WC_Data_Store::read_multiple()
wp-content/plugins/woocommerce/includes/class-wc-order-factory.php:123
WC_Order_Factory::get_orders()
wp-content/plugins/woocommerce/src/Internal/DataStores/Orders/OrdersTableDataStore.php:2316
Automattic\W\I\D\O\OrdersTableDataStore::query()
wp-content/plugins/woocommerce/includes/class-wc-data-store.php:224
WC_Data_Store::__call()
wp-content/plugins/woocommerce/includes/class-wc-order-query.php:87
WC_Order_Query::get_orders()
wp-content/plugins/woocommerce/includes/wc-order-functions.php:69
wc_get_orders()
wp-content/plugins/woocommerce/src/Internal/Admin/Orders/ListTable.php:333
Automattic\W\I\A\O\ListTable::prepare_items()
wp-content/plugins/woocommerce/src/Internal/Admin/Orders/PageController.php:219
Automattic\W\I\A\O\PageController::output()
wp-includes/class-wp-hook.php:308
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:332
WP_Hook::do_action()
wp-includes/plugin.php:517
do_action()
wp-admin/admin.php:259